[RFC][PATCH] audit: get inode pathname patch

[Serge E. Hallyn]

Quoting Mimi Zohar (zohar at linux.vnet.ibm.com):
> We are interested in using auditing's context pathname information.  
> Is this the best way of accessing it?
> 
> Add support for accessing auditing's inode full pathname.

Interesting idea.  It does seem to do what you need.

-serge

> Signed-off-by: Mimi Zohar <zohar at us.ibm.com>
> 
> Index: security-testing-2.6/include/linux/audit.h
> ===================================================================
> --- security-testing-2.6.orig/include/linux/audit.h
> +++ security-testing-2.6/include/linux/audit.h
> @@ -403,6 +403,8 @@ extern void audit_syscall_entry(int arch
>  				unsigned long a2, unsigned long a3);
>  extern void audit_syscall_exit(int failed, long return_code);
>  extern void __audit_getname(const char *name);
> +extern const char *audit_get_inode_pathname(struct task_struct *tsk,
> +					    struct inode *inode);
>  extern void audit_putname(const char *name);
>  extern void __audit_inode(const char *name, const struct dentry *dentry);
>  extern void __audit_inode_child(const char *dname, const struct dentry *dentry,
> Index: security-testing-2.6/kernel/auditsc.c
> ===================================================================
> --- security-testing-2.6.orig/kernel/auditsc.c
> +++ security-testing-2.6/kernel/auditsc.c
> @@ -1677,6 +1677,28 @@ retry:
>  #endif
>  }
> 
> +const char *audit_get_inode_pathname(struct task_struct *tsk,
> +				     struct inode *inode)
> +{
> +	struct audit_context *context;
> +	int idx;
> +
> +	context = tsk->audit_context;
> +	if (!context)
> +		return NULL;
> +	for (idx = 0; idx < context->name_count; idx++) {
> +		struct audit_names *n = &context->names[idx];
> +
> +		if (!n->name)
> +			continue;
> +
> +		if (n->ino == inode->i_ino)
> +			return n->name;
> +	}
> +	return NULL;
> +}
> +EXPORT_SYMBOL_GPL(audit_get_inode_pathname);
> +
>  /**
>   * audit_getname - add a name to the list
>   * @name: name to add
> 
> 
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